Who first called Death "the Grim Reaper"?

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Why: I don't remember why, but yesterday, I read the Prologue and Chapter 1 of Flowers in the Attic. One time, Emily told me that book gave her her first "funny feelings" as a young Mormon in Oregon. I couldn't find any of the funny business on the Internet, but I did read:

I hated it every time someone asked how he died, and what a pity someone so young should die, when so many who were useless and unfit, lived on and on, and were a burden to society.

From all that I heard, and overheard, fate was a reaper, never kind, with little respect for who was loved and needed.

Grim, indeed!

Answer: The legend of the personified "Death" has been around for a long, long time, but as far as anyone can tell, he's only been "grim" for the last century or so. This is a weird thing that I found. Either a lawyer or a judge said it:

So far, the earliest reference was to a 1931 legal case in Florida. It’s the State of Florida ex. rel. Skillman v. City of Miami, 101 Fla. 585 at 591: "When one looks upon a funeral home, his thoughts naturally turn to the certainty of death and to the scenes of desolation and sorrow which, within his experience, have been occasioned by the grim reaper." The case, involving a funeral home, was heard in the Florida Supreme Court, the opinion dated May 12, 1931.

Someone else mentioned that the name "Grim" comes from Grimnir - aka the Germanic god Odin - who personified death in some legends. I don't know about that.

Source: Yahoo! Answers, The Eerie Side of Things,

The More You Know: One of my favorite movies ever is Bill & Ted's Bogus Journey. In fact, I have been thinking a lot lately that someday, I would like to have a pet named De Nomolos. Anyway,

You might be a king or a little street sweeper, but sooner or later, you dance with the reaper.